# yum list installed *ldap*
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Installed Packages
nss_ldap.i386 253-37.el5_6.1 installed
nss_ldap.x86_64 253-37.el5_6.1 installed
openldap.i386 2.3.43-25.el5 installed
openldap.x86_64 2.3.43-25.el5 installed
openldap-clients.x86_64 2.3.43-25.el5 installed
openldap-servers.x86_64 2.3.43-25.el5 installed
openldap-servers-sql.x86_64 2.3.43-25.el5 installed
php-ldap.x86_64 5.1.6-27.el5_7.4 installed..